Blackstone Group - undifferentiated rock (RIZbu;0)

Blackstone Group - undifferentiated rock

Consists of associations of the above rock types. Locally cut by granitic rocks of the Esmond Igneous Suite, resulting in migmatitic appearance. Includes rock mapped formerly as undifferentiated Blackstone Series and migmatite.

State	Rhode Island
Name	Blackstone Group - undifferentiated rock
Geologic age	Late Proterozoic? or older?
Lithologic constituents	Major Metamorphic > Migmatiteundifferentiated rock - Consists of associations of the above rock types. Locally cut by granitic rocks of the Esmond Igneous Suite, resulting in migmatitic appearance.
Comments	Part of Esmond-Dedham Subterrane (West Bay Area)
References	Hermes, O.D. (comp.), Gromet, L.P. (comp.), Murray, D.P. (comp.), Hamidzada, N.A., Skehan, J.W., and Mosher, S., 1994, Bedrock geologic map of Rhode Island: Rhode Island Map Series No. 1, Kingston, Rhode Island, scale 1:100,000.
NGMDB product	NGMDB product page for 19719
Counties	Kent - Providence

Blackstone Group - undifferentiated rock

Hermes, O.D. (comp.), Gromet, L.P. (comp.), Murray, D.P. (comp.), Hamidzada, N.A., Skehan, J.W., and Mosher, S., 1994, Bedrock geologic map of Rhode Island: Rhode Island Map Series No. 1, Kingston, Rhode Island, scale 1:100,000.